Displ trimalleol fx l low leg, subs for clos fx w nonunion

This code signifies a complex fracture involving all three malleoli (medial, lateral, and posterior) of the left ankle, where the bone fragments are not properly aligned. It specifically indicates that the patient is in a subsequent phase of care for this injury, and the fracture has failed to heal after a closed treatment method.

Apply this code for patients presenting for follow-up care of a previously treated left trimalleolar fracture that was managed non-surgically, and imaging or clinical assessment confirms the absence of bony union. This would be appropriate for office visits, cast changes, or evaluations related to theeding of the nonunion.

• Ensure documentation clearly specifies "left" lower leg and "trimalleolar" involvement.
• Verify that the fracture was initially treated as "closed" and that "nonunion" is explicitly documented.
• Confirm the encounter is for "subsequent" care, not initial treatment or active healing.